Back to top

Please select a color/size.


  • Signature Moisture Transport System wicks sweat to keep you dry and light
  • Lightweight, 4-way stretch construction improves mobility and maintains shape
  • Antimicrobial technology helps keep you fresher, longer
  • Ergonomic flatlock seams deliver a comfortable, chafe- free fit
  • Wide, flat waistband with internal continuous drawcord
  • Water-resistant side zip pocket
  • Breathable mesh leg panels to dump excess heat
  • Reflective logos enhance your visibility on low-light runs


View all Under Armour Women's Running Tights

REI membership


Best Use Running
Fabric 80% polyester/20% elastane
Moisture Wicking Yes
Quick Drying Yes
Tights Length Ankle-length
Gender Women's

Size chart

Rated 5 out of 5 by from Great for running! I bought these because I was looking for a lighter weight, cooler pair of running pants. I have been using the walmart brand ones which are heavy and they have been leaving me overheated lately with the oncoming summer heat. These pants were great. They're thin and keep me cool. I have even taken them backpacking and they still keep me cool while keeping the plants and buggers out (I don't like wearing pants with ankle openings). I made sure to get these on sale/clearance though because otherwise they're too expensive.
Date published: 2016-06-20
Rated 5 out of 5 by from Great leggings!! These leggings are great! I love how the back calf part is sheer. They're also very breathable and size fits great. I wear a exactly a size 6 and a medium fits me perfect!
Date published: 2016-04-18
Rated 5 out of 5 by from Very comfortable and fits well I am 5'4, 115 pounds and size small fits well. I do very heavy cardio and yoga in them and they do not ride up or sag. They look really good and I really like them.
Date published: 2016-05-05
Rated 5 out of 5 by from Great leggings Love the compression I get with these leggings. I love the details with the mesh inserts in the legs- not overdone, just enough to add interest to black leggings.
Date published: 2016-03-03
Rated 5 out of 5 by from Makes running in the cold worth it These pants were purchased after I had bought a pair of running pants from another brand name company which unexpectedly ripped. As I was very disappointed (especially since they were from a reputable brand) I purchased these and I am very pleased. They have zippered pockets for essentials as well as reflectors on the back to keep you visible to others. The only con is that they did not come in petites. Otherwise, I would highly recommend them.
Date published: 2017-01-31
Rated 4 out of 5 by from Doing the trick! Can't complain about these leggings. I've mostly been using them indoors at the climbing gym, so I can't say much about using them in colder temps. I imagine that because of the mesh back on the calves, they're not the best for really cold days, but otherwise they're very comfortable and the zip up pocket is large and very convenient. The leggings can be a bit pricey though!
Date published: 2017-03-21
Rated 5 out of 5 by from Love these! I've only run in these once, so I can't speak to how durable these are, but they are very comfortable. They have good compression and stay in place well when I run. I also love the side zip pocket, which is big enough for a phone or keys, etc.
Date published: 2017-04-03
Rated 5 out of 5 by from Comfortable and Flattering Was hesitant to buy due to the price, but it was well worth it. It compresses and shapes my glutes and thighs into a flattering shape. That's pretty impressive considering I don't really work out. So, yeah. Look out, Gigi Hadid. Rawr.
Date published: 2017-05-29
  • y_2017, m_6, d_21, h_10
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_9
  • loc_en_US, sid_893895, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_rei-inc
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 54ms

What's the inseam on these? I'm tall and have a hard time finding running tights long enough.

Asked by: Nikkone
These leggings are an ankle length with an approximate inseam of 29.5 inches.
Answered by: REIservice
Date published: 2016-12-28

I wear a size 2 or 4 & am 5' 6" tall. Would the XS fit?

Asked by: Dakota A
Based on the information that you provided, an XS in the Women's Fly By Run Leggings should fit.
Answered by: REIservice
Date published: 2016-06-20
  • y_2017, m_6, d_21, h_14CST
  • bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_2
  • loc_en_US, sid_893895, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_rei-inc
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 40ms